Information Volume Threshold for Graphical Variable Message Signs Based on Drivers’ Visual Cognition Behavior

Table 4

Ranking results of different evaluation indexes and their optimal values.

No.	The number of roads	Group	D^+	D^−	Ci	Rank
1	3	Control	0.012	0.078	0.863	1
2	4	Control	0.034	0.048	0.585	4
3	5	Control	0.031	0.054	0.638	3
4	6	Control	0.066	0.018	0.212	8
5	7	Control	0.076	0.006	0.074	9
6	3	Experiment	0.027	0.056	0.675	2
7	4	Experiment	0.047	0.036	0.439	6
8	5	Experiment	0.039	0.043	0.524	5
9	6	Experiment	0.065	0.020	0.234	7
10	7	Experiment	0.081	0.003	0.038	10